$ $eaba$$ AC Members Sep 25, 2006 693 0 0 Nov 17, 2007 #1 So at my LFS they have both the instant ocean hydrometer, which is the swing arm type, and there is also a cheaper hydrometer/thermometer bobber made by Aquatic Gardens. Is the bobber type on much less accurate than the swing arm or?
So at my LFS they have both the instant ocean hydrometer, which is the swing arm type, and there is also a cheaper hydrometer/thermometer bobber made by Aquatic Gardens. Is the bobber type on much less accurate than the swing arm or?
Squawkbert Senior padder Oct 3, 2006 3,417 2 38 62 ST.L area www.aquaticplantcentral.com Nov 17, 2007 #2 IMHO refractometer>>>bobber>>swing arm
